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File Content: `BCGintelligentmail.barcode.php`

<?php
/**
 *--------------------------------------------------------------------
 *
 * Sub-Class - Intelligent Mail
 *
 * A postnet is composed of either 5, 9 or 11 digits used by US postal service.
 *
 *--------------------------------------------------------------------
 * Copyright (C) Jean-Sebastien Goupil
 * http://www.barcodephp.com
 */
include_once('BCGParseException.php');
include_once('BCGArgumentException.php');
include_once('BCGBarcode1D.php');

class BCGintelligentmail extends BCGBarcode1D {
    private $barcodeIdentifier;         // string
    private $serviceTypeIdentifier;     // string
    private $mailerIdentifier;          // string
    private $serialNumber;              // string

    private $quietZone;                 // bool

    private $data;

    private static $characterTable1 = array(
        31,     7936,   47,     7808,   55,     7552,   59,     7040,   61,     6016,
        62,     3968,   79,     7744,   87,     7488,   91,     6976,   93,     5952,
        94,     3904,   103,    7360,   107,    6848,   109,    5824,   110,    3776,
        115,    6592,   117,    5568,   118,    3520,   121,    5056,   122,    3008,
        124,    1984,   143,    7712,   151,    7456,   155,    6944,   157,    5920,
        158,    3872,   167,    7328,   171,    6816,   173,    5792,   174,    3744,
        179,    6560,   181,    5536,   182,    3488,   185,    5024,   186,    2976,
        188,    1952,   199,    7264,   203,    6752,   205,    5728,   206,    3680,
        211,    6496,   213,    5472,   214,    3424,   217,    4960,   218,    2912,
        220,    1888,   227,    6368,   229,    5344,   230,    3296,   233,    4832,
        234,    2784,   236,    1760,   241,    4576,   242,    2528,   244,    1504,
        248,    992,    271,    7696,   279,    7440,   283,    6928,   285,    5904,
        286,    3856,   295,    7312,   299,    6800,   301,    5776,   302,    3728,
        307,    6544,   309,    5520,   310,    3472,   313,    5008,   314,    2960,
        316,    1936,   327,    7248,   331,    6736,   333,    5712,   334,    3664,
        339,    6480,   341,    5456,   342,    3408,   345,    4944,   346,    2896,
        348,    1872,   355,    6352,   357,    5328,   358,    3280,   361,    4816,
        362,    2768,   364,    1744,   369,    4560,   370,    2512,   372,    1488,
        376,    976,    391,    7216,   395,    6704,   397,    5680,   398,    3632,
        403,    6448,   405,    5424,   406,    3376,   409,    4912,   410,    2864,
        412,    1840,   419,    6320,   421,    5296,   422,    3248,   425,    4784,
        426,    2736,   428,    1712,   433,    4528,   434,    2480,   436,    1456,
        440,    944,    451,    6256,   453,    5232,   454,    3184,   457,    4720,
        458,    2672,   460,    1648,   465,    4464,   466,    2416,   468,    1392,
        472,    880,    481,    4336,   482,    2288,   484,    1264,   488,    752,
        527,    7688,   535,    7432,   539,    6920,   541,    5896,   542,    3848,
        551,    7304,   555,    6792,   557,    5768,   558,    3720,   563,    6536,
        565,    5512,   566,    3464,   569,    5000,   570,    2952,   572,    1928,
        583,    7240,   587,    6728,   589,    5704,   590,    3656,   595,    6472,
        597,    5448,   598,    3400,   601,    4936,   602,    2888,   604,    1864,
        611,    6344,   613,    5320,   614,    3272,   617,    4808,   618,    2760,
        620,    1736,   625,    4552,   626,    2504,   628,    1480,   632,    968,
        647,    7208,   651,    6696,   653,    5672,   654,    3624,   659,    6440,
        661,    5416,   662,    3368,   665,    4904,   666,    2856,   668,    1832,
        675,    6312,   677,    5288,   678,    3240,   681,    4776,   682,    2728,
        684,    1704,   689,    4520,   690,    2472,   692,    1448,   696,    936,
        707,    6248,   709,    5224,   710,    3176,   713,    4712,   714,    2664,
        716,    1640,   721,    4456,   722,    2408,   724,    1384,   728,    872,
        737,    4328,   738,    2280,   740,    1256,   775,    7192,   779,    6680,
        781,    5656,   782,    3608,   787,    6424,   789,    5400,   790,    3352,
        793,    4888,   794,    2840,   796,    1816,   803,    6296,   805,    5272,
        806,    3224,   809,    4760,   810,    2712,   812,    1688,   817,    4504,
        818,    2456,   820,    1432,   824,    920,    835,    6232,   837,    5208,
        838,    3160,   841,    4696,   842,    2648,   844,    1624,   849,    4440,
        850,    2392,   852,    1368,   865,    4312,   866,    2264,   868,    1240,
        899,    6200,   901,    5176,   902,    3128,   905,    4664,   906,    2616,
        908,    1592,   913,    4408,   914,    2360,   916,    1336,   929,    4280,
        930,    2232,   932,    1208,   961,    4216,   962,    2168,   964,    1144,
        1039,   7684,   1047,   7428,   1051,   6916,   1053,   5892,   1054,   3844,
        1063,   7300,   1067,   6788,   1069,   5764,   1070,   3716,   1075,   6532,
        1077,   5508,   1078,   3460,   1081,   4996,   1082,   2948,   1084,   1924,
        1095,   7236,   1099,   6724,   1101,   5700,   1102,   3652,   1107,   6468,
        1109,   5444,   1110,   3396,   1113,   4932,   1114,   2884,   1116,   1860,
        1123,   6340,   1125,   5316,   1126,   3268,   1129,   4804,   1130,   2756,
        1132,   1732,   1137,   4548,   1138,   2500,   1140,   1476,   1159,   7204,
        1163,   6692,   1165,   5668,   1166,   3620,   1171,   6436,   1173,   5412,
        1174,   3364,   1177,   4900,   1178,   2852,   1180,   1828,   1187,   6308,
        1189,   5284,   1190,   3236,   1193,   4772,   1194,   2724,   1196,   1700,
        1201,   4516,   1202,   2468,   1204,   1444,   1219,   6244,   1221,   5220,
        1222,   3172,   1225,   4708,   1226,   2660,   1228,   1636,   1233,   4452,
        1234,   2404,   1236,   1380,   1249,   4324,   1250,   2276,   1287,   7188,
        1291,   6676,   1293,   5652,   1294,   3604,   1299,   6420,   1301,   5396,
        1302,   3348,   1305,   4884,   1306,   2836,   1308,   1812,   1315,   6292,
        1317,   5268,   1318,   3220,   1321,   4756,   1322,   2708,   1324,   1684,
        1329,   4500,   1330,   2452,   1332,   1428,   1347,   6228,   1349,   5204,
        1350,   3156,   1353,   4692,   1354,   2644,   1356,   1620,   1361,   4436,
        1362,   2388,   1377,   4308,   1378,   2260,   1411,   6196,   1413,   5172,
        1414,   3124,   1417,   4660,   1418,   2612,   1420,   1588,   1425,   4404,
        1426,   2356,   1441,   4276,   1442,   2228,   1473,   4212,   1474,   2164,
        1543,   7180,   1547,   6668,   1549,   5644,   1550,   3596,   1555,   6412,
        1557,   5388,   1558,   3340,   1561,   4876,   1562,   2828,   1564,   1804,
        1571,   6284,   1573,   5260,   1574,   3212,   1577,   4748,   1578,   2700,
        1580,   1676,   1585,   4492,   1586,   2444,   1603,   6220,   1605,   5196,
        1606,   3148,   1609,   4684,   1610,   2636,   1617,   4428,   1618,   2380,
        1633,   4300,   1634,   2252,   1667,   6188,   1669,   5164,   1670,   3116,
        1673,   4652,   1674,   2604,   1681,   4396,   1682,   2348,   1697,   4268,
        1698,   2220,   1729,   4204,   1730,   2156,   1795,   6172,   1797,   5148,
        1798,   3100,   1801,   4636,   1802,   2588,   1809,   4380,   1810,   2332,
        1825,   4252,   1826,   2204,   1857,   4188,   1858,   2140,   1921,   4156,
        1922,   2108,   2063,   7682,   2071,   7426,   2075,   6914,   2077,   5890,
        2078,   3842,   2087,   7298,   2091,   6786,   2093,   5762,   2094,   3714,
        2099,   6530,   2101,   5506,   2102,   3458,   2105,   4994,   2106,   2946,
        2119,   7234,   2123,   6722,   2125,   5698,   2126,   3650,   2131,   6466,
        2133,   5442,   2134,   3394,   2137,   4930,   2138,   2882,   2147,   6338,
        2149,   5314,   2150,   3266,   2153,   4802,   2154,   2754,   2161,   4546,
        2162,   2498,   2183,   7202,   2187,   6690,   2189,   5666,   2190,   3618,
        2195,   6434,   2197,   5410,   2198,   3362,   2201,   4898,   2202,   2850,
        2211,   6306,   2213,   5282,   2214,   3234,   2217,   4770,   2218,   2722,
        2225,   4514,   2226,   2466,   2243,   6242,   2245,   5218,   2246,   3170,
        2249,   4706,   2250,   2658,   2257,   4450,   2258,   2402,   2273,   4322,
        2311,   7186,   2315,   6674,   2317,   5650,   2318,   3602,   2323,   6418,
        2325,   5394,   2326,   3346,   2329,   4882,   2330,   2834,   2339,   6290,
        2341,   5266,   2342,   3218,   2345,   4754,   2346,   2706,   2353,   4498,
        2354,   2450,   2371,   6226,   2373,   5202,   2374,   3154,   2377,   4690,
        2378,   2642,   2385,   4434,   2401,   4306,   2435,   6194,   2437,   5170,
        2438,   3122,   2441,   4658,   2442,   2610,   2449,   4402,   2465,   4274,
        2497,   4210,   2567,   7178,   2571,   6666,   2573,   5642,   2574,   3594,
        2579,   6410,   2581,   5386,   2582,   3338,   2585,   4874,   2586,   2826,
        2595,   6282,   2597,   5258,   2598,   3210,   2601,   4746,   2602,   2698,
        2609,   4490,   2627,   6218,   2629,   5194,   2630,   3146,   2633,   4682,
        2641,   4426,   2657,   4298,   2691,   6186,   2693,   5162,   2694,   3114,
        2697,   4650,   2705,   4394,   2721,   4266,   2753,   4202,   2819,   6170,
        2821,   5146,   2822,   3098,   2825,   4634,   2833,   4378,   2849,   4250,
        2881,   4186,   2945,   4154,   3079,   7174,   3083,   6662,   3085,   5638,
        3086,   3590,   3091,   6406,   3093,   5382,   3094,   3334,   3097,   4870,
        3107,   6278,   3109,   5254,   3110,   3206,   3113,   4742,   3121,   4486,
        3139,   6214,   3141,   5190,   3145,   4678,   3153,   4422,   3169,   4294,
        3203,   6182,   3205,   5158,   3209,   4646,   3217,   4390,   3233,   4262,
        3265,   4198,   3331,   6166,   3333,   5142,   3337,   4630,   3345,   4374,
        3361,   4246,   3393,   4182,   3457,   4150,   3587,   6158,   3589,   5134,
        3593,   4622,   3601,   4366,   3617,   4238,   3649,   4174,   3713,   4142,
        3841,   4126,   4111,   7681,   4119,   7425,   4123,   6913,   4125,   5889,
        4135,   7297,   4139,   6785,   4141,   5761,   4147,   6529,   4149,   5505,
        4153,   4993,   4167,   7233,   4171,   6721,   4173,   5697,   4179,   6465,
        4181,   5441,   4185,   4929,   4195,   6337,   4197,   5313,   4201,   4801,
        4209,   4545,   4231,   7201,   4235,   6689,   4237,   5665,   4243,   6433,
        4245,   5409,   4249,   4897,   4259,   6305,   4261,   5281,   4265,   4769,
        4273,   4513,   4291,   6241,   4293,   5217,   4297,   4705,   4305,   4449,
        4359,   7185,   4363,   6673,   4365,   5649,   4371,   6417,   4373,   5393,
        4377,   4881,   4387,   6289,   4389,   5265,   4393,   4753,   4401,   4497,
        4419,   6225,   4421,   5201,   4425,   4689,   4483,   6193,   4485,   5169,
        4489,   4657,   4615,   7177,   4619,   6665,   4621,   5641,   4627,   6409,
        4629,   5385,   4633,   4873,   4643,   6281,   4645,   5257,   4649,   4745,
        4675,   6217,   4677,   5193,   4739,   6185,   4741,   5161,   4867,   6169,
        4869,   5145,   5127,   7173,   5131,   6661,   5133,   5637,   5139,   6405,
        5141,   5381,   5155,   6277,   5157,   5253,   5187,   6213,   5251,   6181,
        5379,   6165,   5635,   6157,   6151,   7171,   6155,   6659,   6163,   6403,
        6179,   6275,   6211,   5189,   4681,   4433,   4321,   3142,   2634,   2386,
        2274,   1612,   1364,   1252,   856,    744,    496);

    private static $characterTable2 = array(
        3,      6144,   5,      5120,   6,      3072,   9,      4608,   10,     2560,
        12,     1536,   17,     4352,   18,     2304,   20,     1280,   24,     768,
        33,     4224,   34,     2176,   36,     1152,   40,     640,    48,     384,
        65,     4160,   66,     2112,   68,     1088,   72,     576,    80,     320,
        96,     192,    129,    4128,   130,    2080,   132,    1056,   136,    544,
        144,    288,    257,    4112,   258,    2064,   260,    1040,   264,    528,
        513,    4104,   514,    2056,   516,    1032,   1025,   4100,   1026,   2052,
        2049,   4098,   4097,   2050,   1028,   520,    272,    160);

    private static $barPositions = array(
        array(array(7, 2),  array(4, 3)),
        array(array(1, 10), array(0, 0)),
        array(array(9, 12), array(2, 8)),
        array(array(5, 5),  array(6, 11)),
        array(array(8, 9),  array(3, 1)),
        array(array(0, 1),  array(5, 12)),
        array(array(2, 5),  array(1, 8)),
        array(array(4, 4),  array(9, 11)),
        array(array(6, 3),  array(8, 10)),
        array(array(3, 9),  array(7, 6)),
        array(array(5, 11), array(1, 4)),
        array(array(8, 5),  array(2, 12)),
        array(array(9, 10), array(0, 2)),
        array(array(7, 1),  array(6, 7)),
        array(array(3, 6),  array(4, 9)),
        array(array(0, 3),  array(8, 6)),
        array(array(6, 4),  array(2, 7)),
        array(array(1, 1),  array(9, 9)),
        array(array(7, 10), array(5, 2)),
        array(array(4, 0),  array(3, 8)),
        array(array(6, 2),  array(0, 4)),
        array(array(8, 11), array(1, 0)),
        array(array(9, 8),  array(3, 12)),
        array(array(2, 6),  array(7, 7)),
        array(array(5, 1),  array(4, 10)),
        array(array(1, 12), array(6, 9)),
        array(array(7, 3),  array(8, 0)),
        array(array(5, 8),  array(9, 7)),
        array(array(4, 6),  array(2, 10)),
        array(array(3, 4),  array(0, 5)),
        array(array(8, 4),  array(5, 7)),
        array(array(7, 11), array(1, 9)),
        array(array(6, 0),  array(9, 6)),
        array(array(0, 6),  array(4, 8)),
        array(array(2, 1),  array(3, 2)),
        array(array(5, 9),  array(8, 12)),
        array(array(4, 11), array(6, 1)),
        array(array(9, 5),  array(7, 4)),
        array(array(3, 3),  array(1, 2)),
        array(array(0, 7),  array(2, 0)),
        array(array(1, 3),  array(4, 1)),
        array(array(6, 10), array(3, 5)),
        array(array(8, 7),  array(9, 4)),
        array(array(2, 11), array(5, 6)),
        array(array(0, 8),  array(7, 12)),
        array(array(4, 2),  array(8, 1)),
        array(array(5, 10), array(3, 0)),
        array(array(9, 3),  array(0, 9)),
        array(array(6, 5),  array(2, 4)),
        array(array(7, 8),  array(1, 7)),
        array(array(5, 0),  array(4, 5)),
        array(array(2, 3),  array(0, 10)),
        array(array(6, 12), array(9, 2)),
        array(array(3, 11), array(1, 6)),
        array(array(8, 8),  array(7, 9)),
        array(array(5, 4),  array(0, 11)),
        array(array(1, 5),  array(2, 2)),
        array(array(9, 1),  array(4, 12)),
        array(array(8, 3),  array(6, 6)),
        array(array(7, 0),  array(3, 7)),
        array(array(4, 7),  array(7, 5)),
        array(array(0, 12), array(1, 11)),
        array(array(2, 9),  array(9, 0)),
        array(array(6, 8),  array(5, 3)),
        array(array(3, 10), array(8, 2))
    );

    /**
     * Constructor.
     */
    public function __construct() {
        parent::__construct();

        $this->setQuietZone(true);
        $this->setThickness(9);
    }

    /**
     * Gets the Quiet zone.
     *
     * @return bool
     */
    public function getQuietZone() {
        return $this->quietZone;
    }

    /**
     * Sets the Quiet zone.
     *
     * @param bool $quietZone
     */
    public function setQuietZone($quietZone) {
        $this->quietZone = (bool)$quietZone;
    }

    /**
     * Sets the tracking code.
     *
     * @param int $barcodeIdentifier 2-digit number. 2nd digit must be 0-4
     * @param int $serviceTypeIdentifier 3 digits
     * @param int $mailerIdentifier 6 or 9 digits
     * @param int $serialNumber 9 (if mailerId is 6) or 6 digits (if mailerId is 9)
     */
    public function setTrackingCode($barcodeIdentifier, $serviceTypeIdentifier, $mailerIdentifier, $serialNumber) {
        $barcodeIdentifier = (string)(int)$barcodeIdentifier;
        $serviceTypeIdentifier = (string)(int)$serviceTypeIdentifier;
        $mailerIdentifier = (string)(int)$mailerIdentifier;
        $serialNumber = (string)(int)$serialNumber;

        $barcodeIdentifier = str_pad($barcodeIdentifier, 2, '0', STR_PAD_LEFT);

        if (strlen($barcodeIdentifier) !== 2) {
            throw new BCGArgumentException('Barcode Identifier must contain 2 digits.', 'barcodeIdentifier');
        }

        $barcodeIdentifierSecondNumber = $barcodeIdentifier[1];
        if ($barcodeIdentifierSecondNumber !== '0' && $barcodeIdentifierSecondNumber !== '1' && $barcodeIdentifierSecondNumber !== '2' && $barcodeIdentifierSecondNumber !== '3' && $barcodeIdentifierSecondNumber !== '4') {
            throw new BCGArgumentException('Barcode Identifier second digit must be a number between 0 and 4.', 'barcodeIdentifier');
        }

        if ((int)$serviceTypeIdentifier < 0 || (int)$serviceTypeIdentifier > 999) {
            throw new BCGArgumentException('Service Type Identifier must be between 0 and 999.', 'serviceTypeIdentifier');
        }

        $mailerIdentifierLength = 6;
        if ((int)$mailerIdentifier > 899999) {
            $mailerIdentifierLength = 9;
        }

        if ($mailerIdentifierLength === 9 && strlen($serialNumber) > 6) {
            throw new BCGArgumentException('If the Serial Number has more than 6 digits, the Mailer Identifier must be lower than 900000.', 'mailerIdentifier');
        }

        if ($mailerIdentifierLength === 9) {
            if ((int)$mailerIdentifierLength < 0 || (int)$mailerIdentifier > 999999999) {
                throw new BCGArgumentException('Mailer Identifier must be between 0 and 999999999.', 'mailerIdentifier');
            }
        }

        $this->barcodeIdentifier = $barcodeIdentifier;
        $this->serviceTypeIdentifier = str_pad((int)$serviceTypeIdentifier, 3, '0', STR_PAD_LEFT);
        $this->mailerIdentifier = str_pad((int)$mailerIdentifier, $mailerIdentifierLength, '0', STR_PAD_LEFT);
        $this->serialNumber = str_pad((int)$serialNumber, $mailerIdentifierLength === 6 ? 9 : 6, '0', STR_PAD_LEFT);
    }

    /**
     * Parses the text before displaying it.
     *
     * @param mixed $text
     */
    public function parse($text) {
        parent::parse($text);

        $number = self::executeStep1($this->text, $this->barcodeIdentifier, $this->serviceTypeIdentifier, $this->mailerIdentifier, $this->serialNumber);
        $crc = self::executeStep2($number);
        $codewords = self::executeStep3($number);
        $codewords = self::executeStep4($codewords, $crc);
        $characters = self::executeStep5($codewords, $crc);
        $this->data = self::executeStep6($characters);
    }

    /**
     * Draws the barcode.
     *
     * @param resource $im
     */
    public function draw($im) {
        if ($this->quietZone) {
            $this->positionX += 9;
        }

        $c = strlen($this->data);
        for ($i = 0; $i < $c; $i++) {
            $this->drawChar($im, $this->data[$i]);
        }

        $this->drawText($im, 0, 0, $this->positionX, $this->thickness + ($this->quietZone ? 4 : 0));
    }

    /**
     * Returns the maximal size of a barcode.
     *
     * @param int $w
     * @param int $h
     * @return int[]
     */
    public function getDimension($w, $h) {
        $w += 65 * 3;
        $h += $this->thickness;

        // We remove the white on the right
        $w -= 1.56;

        if ($this->quietZone) {
            $w += 18;
            $h += 4;
        }

        return parent::getDimension($w, $h);
    }

    /**
     * Validates the input.
     */
    protected function validate() {
        // Tracking must have been entered
        if ($this->barcodeIdentifier === null || $this->serviceTypeIdentifier === null || $this->mailerIdentifier === null || $this->serialNumber === null) {
            throw new BCGParseException('intelligentmail', 'The tracking code must be set before calling the parse method.');
        }

        // Checking if all chars are allowed
        $match = array();
        if (preg_match('/[^0-9]/', $this->text, $match)) {
                throw new BCGParseException('intelligentmail', 'The character \'' . $match[0] . '\' is not allowed.');
        }

        // Must contain 0, 5, 9 or 11 chars
        $c = strlen($this->text);
        if ($c !== 0 && $c !== 5 && $c !== 9 && $c !== 11) {
            throw new BCGParseException('intelligentmail', 'Must contain 0, 5, 9, or 11 characters.');
        }

        parent::validate();
    }

    /**
     * Overloaded method for drawing special barcode.
     *
     * @param resource $im
     * @param string $code
     * @param boolean $startBar
     */
    protected function drawChar($im, $code, $startBar = true) {
        $y1 = 0;
        $y2 = 0;
        switch ($code) {
            case 'A':
                $y1 = 0;
                $y2 = $this->thickness - ($this->thickness / 2.5);
                break;
            case 'D':
                $y1 = 3.096;
                $y2 = $this->thickness - 1;
                break;
            case 'F':
                $y1 = 0;
                $y2 = $this->thickness - 1;
                break;
            case 'T':
                $y1 = 3.096;
                $y2 = $this->thickness - ($this->thickness / 2.5);
                break;
        }

        if ($this->quietZone) {
            $y1 += 2;
            $y2 += 2;
        }

        $this->drawFilledRectangle($im, $this->positionX, $y1, $this->positionX + 0.44, $y2, BCGBarcode::COLOR_FG);
        $this->positionX += 3;
    }

    /**
     * Executes Step 1: Conversion of Data Fields into Binary Data
     *
     * @param string $text
     * @param string $barcodeIdentifier
     * @param string $serviceTypeIdentifier
     * @param string $mailerIdentifier
     * @param string $serialNumber
     * @return string BCNumber
     */
    private static function executeStep1($text, $barcodeIdentifier, $serviceTypeIdentifier, $mailerIdentifier, $serialNumber) {
        $number = self::conversionRoutingCode($text);
        $number = self::conversionTrackingCode($number, $barcodeIdentifier, $serviceTypeIdentifier, $mailerIdentifier, $serialNumber);

        return $number;
    }

    /**
     * Executes Step 2: Generation of 11-Bit CRC on Binary Data
     *
     * @param $number BCNumber
     * @return int
     */
    private static function executeStep2($number) {
        $byteArray = str_pad(self::bcdecuc($number), 13, chr(0), STR_PAD_LEFT);

        $generatorPolynomial = 0x0f35;
        $frameCheckSequence = 0x07ff;
        $data = 0;
        $byteIndex = 0;
        $bit = 0;

        $data = (ord($byteArray[$byteIndex]) << 5) & 0xffff;
        for ($bit = 2; $bit < 8; $bit++) {
            if (($frameCheckSequence ^ $data) & 0x400) {
                $frameCheckSequence = ($frameCheckSequence << 1) ^ $generatorPolynomial;
            } else {
                $frameCheckSequence = ($frameCheckSequence << 1);
            }

            $frameCheckSequence &= 0x7ff;
            $data <<= 1;
            $data &= 0xffff;
        }

        for ($byteIndex = 1; $byteIndex < 13; $byteIndex++) {
            $data = (ord($byteArray[$byteIndex]) << 3) & 0xffff;
            for ($bit = 0; $bit < 8; $bit++) {
                if (($frameCheckSequence ^ $data) & 0x0400) {
                    $frameCheckSequence = ($frameCheckSequence << 1) ^ $generatorPolynomial;
                } else {
                    $frameCheckSequence = ($frameCheckSequence << 1);
                }

                $frameCheckSequence &= 0x7ff;
                $data <<= 1;
                $data &= 0xffff;
            }
        }
        
        return $frameCheckSequence;
    }

    /**
     * Executes Step 3: Conversion from Binary Data to Codewords
     *
     * @param string $number BCNumber
     * @return int[]
     */
    private static function executeStep3($number) {
        $codewords = array();
        $codewords[9] = (int)bcmod($number, '636');
        $number = bcdiv($number, '636', 0);

        for ($i = 8; $i >= 0; $i--) {
            $codewords[$i] = (int)bcmod($number, '1365');
            $number = bcdiv($number, '1365', 0);
        }

        return $codewords;
    }

    /**
     * Executes Step 4: Inserting Additional Information into Codewords
     *
     * @param int[] $codewords
     * @param int $crc
     * @return int[]
     */
    private static function executeStep4($codewords, $crc) {
        $codewords[9] *= 2;
        if ($crc & 0x400) {
            $codewords[0] += 659;
        }

        return $codewords;
    }

    /**
     * Executes Step 5: Conversion from Codewords to Characters
     *
     * @param int[] $codewords
     * @param int $crc
     * @return int[]
     */
    private static function executeStep5($codewords, $crc) {
        $characters = array();
        for ($i = 0; $i < 10; $i++) {
            if ($codewords[$i] <= 1286) {
                $characters[$i] = self::$characterTable1[$codewords[$i]];
            } else {
                $characters[$i] = self::$characterTable2[$codewords[$i] - 1287];
            }
        }

        for ($i = 0; $i < 10; $i++) {
            $mask = 1 << $i;
            if ($crc & $mask) {
                $characters[$i] ^= 0x1fff;
            }
        }

        return $characters;
    }

    /**
     * Executes Step 6: Conversion from Characters to the Intelligent Mail Barcode
     *
     * @param int[] $characters
     * @return string
     */
    private static function executeStep6($characters) {
        $bars = '';
        for ($i = 0; $i < 65; $i++) {
            $barPosition = self::$barPositions[$i];
            $descender = $barPosition[0];
            $ascender = $barPosition[1];
            $extenderDescender = !!($characters[$descender[0]] & (1 << $descender[1]));
            $extenderAscender = !!($characters[$ascender[0]] & (1 << $ascender[1]));

            if ($extenderDescender && $extenderAscender) {
                $bars .= 'F';
            } elseif ($extenderDescender) {
                $bars .= 'D';
            } elseif ($extenderAscender) {
                $bars .= 'A';
            } else {
                $bars .= 'T';
            }
        }

        return $bars;
    }

    /**
     * Converts the routing code zipcode.
     *
     * @param string $zipcode
     * @return string BCNumber
     */
    private static function conversionRoutingCode($zipcode) {
        $number = $zipcode;
        switch (strlen($zipcode)) {
            case 11:
                $number = bcadd($number, '1000000000', 0);
            case 9:
                $number = bcadd($number, '100000', 0);
            case 5:
                $number = bcadd($number, '1', 0);
            default:
                return $number;
        }
    }

    /**
     * Converts the tracking code number.
     *
     * @param string $number BCNumber
     * @param string $barcodeIdentifier
     * @param string $serviceTypeIdentifier
     * @param string $mailerIdentifier
     * @param string $serialNumber
     * @return string BCNumber
     */
    private static function conversionTrackingCode($number, $barcodeIdentifier, $serviceTypeIdentifier, $mailerIdentifier, $serialNumber) {
        $number = bcmul($number, 10, 0);
        $number = bcadd($number, $barcodeIdentifier[0], 0);
        $number = bcmul($number, 5, 0);
        $number = bcadd($number, $barcodeIdentifier[1], 0);

        $temp = $serviceTypeIdentifier . $mailerIdentifier . $serialNumber;
        for ($i = 0; $i < 18; $i++) {
            $number = bcmul($number, 10, 0);
            $number = bcadd($number, $temp[$i], 0);
        }

        return $number;
    }

    /**
     * Transforms a BCNumber into unsigned char*.
     *
     * @param string $dec BCNumber
     * @param string
     */
    private static function bcdecuc($dec) {
        $last = bcmod($dec, 256);
        $remain = bcdiv(bcsub($dec, $last), 256, 0);

        if ($remain == 0) {
                return pack('C', $last);
        } else {
                return self::bcdecuc($remain).pack('C', $last);
        }
    }
}
?>
Name	Size	Permission
drawer	---	0755
BCGArgumentException.php	600 bytes	0644
BCGBarcode.php	14444 bytes	0644
BCGBarcode1D.php	6631 bytes	0644
BCGColor.php	4175 bytes	0644
BCGDrawException.php	486 bytes	0644
BCGDrawing.php	6287 bytes	0644
BCGFont.php	728 bytes	0644
BCGFontFile.php	4849 bytes	0644
BCGFontPhp.php	3451 bytes	0644
BCGLabel.php	7901 bytes	0644
BCGParseException.php	604 bytes	0644
BCGcodabar.barcode.php	3740 bytes	0644
BCGcode11.barcode.php	5234 bytes	0644
BCGcode128.barcode.php	29097 bytes	0644
BCGcode39.barcode.php	5677 bytes	0644
BCGcode39extended.barcode.php	6290 bytes	0644
BCGcode93.barcode.php	9600 bytes	0644
BCGean13.barcode.php	9895 bytes	0644
BCGean8.barcode.php	7411 bytes	0644
BCGgs1128.barcode.php	25845 bytes	0644
BCGi25.barcode.php	5708 bytes	0644
BCGintelligentmail.barcode.php	28550 bytes	0644
BCGisbn.barcode.php	5304 bytes	0644
BCGmsi.barcode.php	5206 bytes	0644
BCGothercode.barcode.php	1834 bytes	0644
BCGpostnet.barcode.php	3758 bytes	0644
BCGs25.barcode.php	4765 bytes	0644
BCGupca.barcode.php	5143 bytes	0644
BCGupce.barcode.php	11973 bytes	0644
BCGupcext2.barcode.php	3670 bytes	0644
BCGupcext5.barcode.php	5736 bytes	0644
JoinDraw.php	5878 bytes	0644
File Content: BCGintelligentmail.barcode.php

File Content: `BCGintelligentmail.barcode.php`
